US PATENT SUBCLASS 508 / 389
.~.~ The sulfur is part of an -O-S(=O)(=O)O- group (i.e., sulfates)

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508 /   HD   SOLID ANTI-FRICTION DEVICES, MATERIALS THEREFOR, LUBRICANT OR SEPARATE COMPOSITIONS FOR MOVING SOLID SURFACES, AND MISCELLANEOUS MINERAL OIL COMPOSITIONS

110  DF  LUBRICANTS OR SEPARANTS FOR MOVING SOLID SURFACES AND MISCELLANEOUS MINERAL OIL COMPOSITIONS (E.G., WATER CONTAINING, ETC.) {53}
388  DF  .~ Organic sulfur compound, wherein the sulfur is single bonded directly to oxygen (e.g., sulfites, etc.) {2}
389.~.~ The sulfur is part of an -O-S(=O)(=O)O- group (i.e., sulfates)

DEFINITION

Classification: 508/389

The sulfur is part of an -O-S(=O)(=O)O- group (i.e., sulfates):

(under subclass 388) Compositions wherein the sulfur is present as part of a sulfate, -O-S(=O)(=O)O-, group.

(1) Note. An example of a component provided for herein is sodium dodecyl sulfate,

Na-O-S(=O)(=O)OC12H25[end subscrpt]